What is the meaning of tattle?

noun

• Disclosing information or giving evidence about another.
  • synonyms: singing, telling

verb

• Speak (about unimportant matters) rapidly and incessantly.
  • synonyms: chatter, piffle, palaver, prate, tittle-tattle, twaddle, clack, maunder, prattle, blab, gibber, blabber, gabble
• Divulge confidential information or secrets.
  • usage: "Be careful-his secretary talks"
  • synonyms: spill the beans, let the cat out of the bag, talk, blab, peach, babble, sing, babble out, blab out